Some of us have had froyo for awhile and there are some changes,
Home switcher app no longer works like it should. But a good replacement is clear default, it basicially direct you to the actual home app so you can clear the default.
A good browser for adobe flash player (IMO the best) is dolphin browser with desktop user agent, and flash ondemand. I prefer flash on demand so that I can choose what content I want to see. If its set t auto then it will slow down loading time, especially for devices not o/c. Im overclocked at 1200 and it slows my phone down, so I can imagine what it would do to a 600mhz droid.
Pandora is still having issues with froyo, prepare to use slacker until they fix it. I offered my help but "we do not support rooted devices". If they would have taken their heads out of their backsides they would have realized I would have been a nice prototype to help them prepare for froyo. Oh well moving on.
To watch movies I suggest use amazon, that way you can watch it later on a laptop.
Powerstrip is a good tool to keep your screen clean. nice to be able to pull up settings widget with out having to go back to the home screen..
Thata all the tips I have for now, maybe other may be able to add to it.